Use chunk-size in function calling mdpr_read_codecdata() rather than in the
[libav.git] / libavformat / rmdec.c
1 /*
2 * "Real" compatible demuxer.
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avstring.h"
23 #include "avformat.h"
24 #include "rm.h"
25
26 static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
27 {
28 int i;
29 char *q, r;
30
31 q = buf;
32 for(i=0;i<len;i++) {
33 r = get_byte(pb);
34 if (i < buf_size - 1)
35 *q++ = r;
36 }
37 if (buf_size > 0) *q = '\0';
38 }
39
40 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
41 {
42 get_strl(pb, buf, buf_size, get_be16(pb));
43 }
44
45 static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
46 {
47 get_strl(pb, buf, buf_size, get_byte(pb));
48 }
49
50 static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
51 int read_all)
52 {
53 RMContext *rm = s->priv_data;
54 ByteIOContext *pb = s->pb;
55 char buf[256];
56 uint32_t version;
57 int i;
58
59 /* ra type header */
60 version = get_be32(pb); /* version */
61 if (((version >> 16) & 0xff) == 3) {
62 int64_t startpos = url_ftell(pb);
63 /* very old version */
64 for(i = 0; i < 14; i++)
65 get_byte(pb);
66 get_str8(pb, s->title, sizeof(s->title));
67 get_str8(pb, s->author, sizeof(s->author));
68 get_str8(pb, s->copyright, sizeof(s->copyright));
69 get_str8(pb, s->comment, sizeof(s->comment));
70 if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
71 // fourcc (should always be "lpcJ")
72 get_byte(pb);
73 get_str8(pb, buf, sizeof(buf));
74 }
75 // Skip extra header crap (this should never happen)
76 if ((startpos + (version & 0xffff)) > url_ftell(pb))
77 url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
78 st->codec->sample_rate = 8000;
79 st->codec->channels = 1;
80 st->codec->codec_type = CODEC_TYPE_AUDIO;
81 st->codec->codec_id = CODEC_ID_RA_144;
82 } else {
83 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
84 /* old version (4) */
85 get_be32(pb); /* .ra4 */
86 get_be32(pb); /* data size */
87 get_be16(pb); /* version2 */
88 get_be32(pb); /* header size */
89 flavor= get_be16(pb); /* add codec info / flavor */
90 rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
91 get_be32(pb); /* ??? */
92 get_be32(pb); /* ??? */
93 get_be32(pb); /* ??? */
94 rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
95 st->codec->block_align= get_be16(pb); /* frame size */
96 rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
97 get_be16(pb); /* ??? */
98 if (((version >> 16) & 0xff) == 5) {
99 get_be16(pb); get_be16(pb); get_be16(pb); }
100 st->codec->sample_rate = get_be16(pb);
101 get_be32(pb);
102 st->codec->channels = get_be16(pb);
103 if (((version >> 16) & 0xff) == 5) {
104 get_be32(pb);
105 buf[0] = get_byte(pb);
106 buf[1] = get_byte(pb);
107 buf[2] = get_byte(pb);
108 buf[3] = get_byte(pb);
109 buf[4] = 0;
110 } else {
111 get_str8(pb, buf, sizeof(buf)); /* desc */
112 get_str8(pb, buf, sizeof(buf)); /* desc */
113 }
114 st->codec->codec_type = CODEC_TYPE_AUDIO;
115 if (!strcmp(buf, "dnet")) {
116 st->codec->codec_id = CODEC_ID_AC3;
117 st->need_parsing = AVSTREAM_PARSE_FULL;
118 } else if (!strcmp(buf, "28_8")) {
119 st->codec->codec_id = CODEC_ID_RA_288;
120 st->codec->extradata_size= 0;
121 rm->audio_framesize = st->codec->block_align;
122 st->codec->block_align = coded_framesize;
123
124 if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
125 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
126 return -1;
127 }
128
129 rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
130 } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) {
131 int codecdata_length, i;
132 get_be16(pb); get_byte(pb);
133 if (((version >> 16) & 0xff) == 5)
134 get_byte(pb);
135 codecdata_length = get_be32(pb);
136 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
137 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
138 return -1;
139 }
140
141 if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
142 else st->codec->codec_id = CODEC_ID_ATRAC3;
143 st->codec->extradata_size= codecdata_length;
144 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
145 for(i = 0; i < codecdata_length; i++)
146 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
147 rm->audio_framesize = st->codec->block_align;
148 st->codec->block_align = rm->sub_packet_size;
149
150 if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
151 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
152 return -1;
153 }
154
155 rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
156 } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
157 int codecdata_length, i;
158 get_be16(pb); get_byte(pb);
159 if (((version >> 16) & 0xff) == 5)
160 get_byte(pb);
161 st->codec->codec_id = CODEC_ID_AAC;
162 codecdata_length = get_be32(pb);
163 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
164 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
165 return -1;
166 }
167 if (codecdata_length >= 1) {
168 st->codec->extradata_size = codecdata_length - 1;
169 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
170 get_byte(pb);
171 for(i = 0; i < st->codec->extradata_size; i++)
172 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
173 }
174 } else {
175 st->codec->codec_id = CODEC_ID_NONE;
176 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
177 }
178 if (read_all) {
179 get_byte(pb);
180 get_byte(pb);
181 get_byte(pb);
182
183 get_str8(pb, s->title, sizeof(s->title));
184 get_str8(pb, s->author, sizeof(s->author));
185 get_str8(pb, s->copyright, sizeof(s->copyright));
186 get_str8(pb, s->comment, sizeof(s->comment));
187 }
188 }
189 return 0;
190 }
191
192 int
193 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVStream *st, int codec_data_size)
194 {
195 ByteIOContext *pb = s->pb;
196 unsigned int v;
197 int size;
198 int64_t codec_pos;
199
200 codec_pos = url_ftell(pb);
201 v = get_be32(pb);
202 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
203 /* ra type header */
204 if (rm_read_audio_stream_info(s, st, 0))
205 return -1;
206 } else {
207 int fps, fps2;
208 if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
209 fail1:
210 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
211 goto skip;
212 }
213 st->codec->codec_tag = get_le32(pb);
214 // av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
215 if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
216 && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
217 && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
218 && st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
219 goto fail1;
220 st->codec->width = get_be16(pb);
221 st->codec->height = get_be16(pb);
222 st->codec->time_base.num= 1;
223 fps= get_be16(pb);
224 st->codec->codec_type = CODEC_TYPE_VIDEO;
225 get_be32(pb);
226 fps2= get_be16(pb);
227 get_be16(pb);
228
229 st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
230
231 if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
232 //check is redundant as get_buffer() will catch this
233 av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
234 return -1;
235 }
236 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
237 if (!st->codec->extradata)
238 return AVERROR(ENOMEM);
239 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
240
241 // av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
242 st->codec->time_base.den = fps * st->codec->time_base.num;
243 switch(((uint8_t*)st->codec->extradata)[4]>>4){
244 case 1: st->codec->codec_id = CODEC_ID_RV10; break;
245 case 2: st->codec->codec_id = CODEC_ID_RV20; break;
246 case 3: st->codec->codec_id = CODEC_ID_RV30; break;
247 case 4: st->codec->codec_id = CODEC_ID_RV40; break;
248 default: goto fail1;
249 }
250 }
251
252 skip:
253 /* skip codec info */
254 size = url_ftell(pb) - codec_pos;
255 url_fskip(pb, codec_data_size - size);
256
257 return 0;
258 }
259
260
261 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
262 {
263 RMContext *rm = s->priv_data;
264 AVStream *st;
265
266 rm->old_format = 1;
267 st = av_new_stream(s, 0);
268 if (!st)
269 return -1;
270 return rm_read_audio_stream_info(s, st, 1);
271 }
272
273 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
274 {
275 RMContext *rm = s->priv_data;
276 AVStream *st;
277 ByteIOContext *pb = s->pb;
278 unsigned int tag;
279 int tag_size;
280 unsigned int start_time, duration;
281 char buf[128];
282 int flags = 0;
283
284 tag = get_le32(pb);
285 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
286 /* very old .ra format */
287 return rm_read_header_old(s, ap);
288 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
289 return AVERROR(EIO);
290 }
291
292 get_be32(pb); /* header size */
293 get_be16(pb);
294 get_be32(pb);
295 get_be32(pb); /* number of headers */
296
297 for(;;) {
298 if (url_feof(pb))
299 return -1;
300 tag = get_le32(pb);
301 tag_size = get_be32(pb);
302 get_be16(pb);
303 #if 0
304 printf("tag=%c%c%c%c (%08x) size=%d\n",
305 (tag) & 0xff,
306 (tag >> 8) & 0xff,
307 (tag >> 16) & 0xff,
308 (tag >> 24) & 0xff,
309 tag,
310 tag_size);
311 #endif
312 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
313 return -1;
314 switch(tag) {
315 case MKTAG('P', 'R', 'O', 'P'):
316 /* file header */
317 get_be32(pb); /* max bit rate */
318 get_be32(pb); /* avg bit rate */
319 get_be32(pb); /* max packet size */
320 get_be32(pb); /* avg packet size */
321 get_be32(pb); /* nb packets */
322 get_be32(pb); /* duration */
323 get_be32(pb); /* preroll */
324 get_be32(pb); /* index offset */
325 get_be32(pb); /* data offset */
326 get_be16(pb); /* nb streams */
327 flags = get_be16(pb); /* flags */
328 break;
329 case MKTAG('C', 'O', 'N', 'T'):
330 get_str16(pb, s->title, sizeof(s->title));
331 get_str16(pb, s->author, sizeof(s->author));
332 get_str16(pb, s->copyright, sizeof(s->copyright));
333 get_str16(pb, s->comment, sizeof(s->comment));
334 break;
335 case MKTAG('M', 'D', 'P', 'R'):
336 st = av_new_stream(s, 0);
337 if (!st)
338 return AVERROR(ENOMEM);
339 st->id = get_be16(pb);
340 get_be32(pb); /* max bit rate */
341 st->codec->bit_rate = get_be32(pb); /* bit rate */
342 get_be32(pb); /* max packet size */
343 get_be32(pb); /* avg packet size */
344 start_time = get_be32(pb); /* start time */
345 get_be32(pb); /* preroll */
346 duration = get_be32(pb); /* duration */
347 st->start_time = start_time;
348 st->duration = duration;
349 get_str8(pb, buf, sizeof(buf)); /* desc */
350 get_str8(pb, buf, sizeof(buf)); /* mimetype */
351 st->codec->codec_type = CODEC_TYPE_DATA;
352 av_set_pts_info(st, 64, 1, 1000);
353 if (ff_rm_read_mdpr_codecdata(s, st, get_be32(pb)) < 0)
354 return -1;
355 break;
356 case MKTAG('D', 'A', 'T', 'A'):
357 goto header_end;
358 default:
359 /* unknown tag: skip it */
360 url_fskip(pb, tag_size - 10);
361 break;
362 }
363 }
364 header_end:
365 rm->nb_packets = get_be32(pb); /* number of packets */
366 if (!rm->nb_packets && (flags & 4))
367 rm->nb_packets = 3600 * 25;
368 get_be32(pb); /* next data header */
369 rm->curpic_num = -1;
370 return 0;
371 }
372
373 static int get_num(ByteIOContext *pb, int *len)
374 {
375 int n, n1;
376
377 n = get_be16(pb);
378 (*len)-=2;
379 n &= 0x7FFF;
380 if (n >= 0x4000) {
381 return n - 0x4000;
382 } else {
383 n1 = get_be16(pb);
384 (*len)-=2;
385 return (n << 16) | n1;
386 }
387 }
388
389 /* multiple of 20 bytes for ra144 (ugly) */
390 #define RAW_PACKET_SIZE 1000
391
392 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
393 RMContext *rm = s->priv_data;
394 ByteIOContext *pb = s->pb;
395 int len, num, res, i;
396 AVStream *st;
397 uint32_t state=0xFFFFFFFF;
398
399 while(!url_feof(pb)){
400 *pos= url_ftell(pb) - 3;
401 if(rm->remaining_len > 0){
402 num= rm->current_stream;
403 len= rm->remaining_len;
404 *timestamp = AV_NOPTS_VALUE;
405 *flags= 0;
406 }else{
407 state= (state<<8) + get_byte(pb);
408
409 if(state == MKBETAG('I', 'N', 'D', 'X')){
410 len = get_be16(pb) - 6;
411 if(len<0)
412 continue;
413 goto skip;
414 }
415
416 if(state > (unsigned)0xFFFF || state < 12)
417 continue;
418 len=state;
419 state= 0xFFFFFFFF;
420
421 num = get_be16(pb);
422 *timestamp = get_be32(pb);
423 res= get_byte(pb); /* reserved */
424 *flags = get_byte(pb); /* flags */
425
426
427 len -= 12;
428 }
429 for(i=0;i<s->nb_streams;i++) {
430 st = s->streams[i];
431 if (num == st->id)
432 break;
433 }
434 if (i == s->nb_streams) {
435 skip:
436 /* skip packet if unknown number */
437 url_fskip(pb, len);
438 rm->remaining_len -= len;
439 continue;
440 }
441 *stream_index= i;
442
443 return len;
444 }
445 return -1;
446 }
447
448 static int rm_assemble_video_frame(AVFormatContext *s, RMContext *rm, AVPacket *pkt, int len)
449 {
450 ByteIOContext *pb = s->pb;
451 int hdr, seq, pic_num, len2, pos;
452 int type;
453
454 hdr = get_byte(pb); len--;
455 type = hdr >> 6;
456 switch(type){
457 case 0: // slice
458 case 2: // last slice
459 seq = get_byte(pb); len--;
460 len2 = get_num(pb, &len);
461 pos = get_num(pb, &len);
462 pic_num = get_byte(pb); len--;
463 rm->remaining_len = len;
464 break;
465 case 1: //whole frame
466 seq = get_byte(pb); len--;
467 if(av_new_packet(pkt, len + 9) < 0)
468 return AVERROR(EIO);
469 pkt->data[0] = 0;
470 AV_WL32(pkt->data + 1, 1);
471 AV_WL32(pkt->data + 5, 0);
472 get_buffer(pb, pkt->data + 9, len);
473 rm->remaining_len = 0;
474 return 0;
475 case 3: //frame as a part of packet
476 len2 = get_num(pb, &len);
477 pos = get_num(pb, &len);
478 pic_num = get_byte(pb); len--;
479 rm->remaining_len = len - len2;
480 if(av_new_packet(pkt, len2 + 9) < 0)
481 return AVERROR(EIO);
482 pkt->data[0] = 0;
483 AV_WL32(pkt->data + 1, 1);
484 AV_WL32(pkt->data + 5, 0);
485 get_buffer(pb, pkt->data + 9, len2);
486 return 0;
487 }
488 //now we have to deal with single slice
489
490 if((seq & 0x7F) == 1 || rm->curpic_num != pic_num){
491 rm->slices = ((hdr & 0x3F) << 1) + 1;
492 rm->videobufsize = len2 + 8*rm->slices + 1;
493 av_free(rm->videobuf);
494 if(!(rm->videobuf = av_malloc(rm->videobufsize)))
495 return AVERROR(ENOMEM);
496 rm->videobufpos = 8*rm->slices + 1;
497 rm->cur_slice = 0;
498 rm->curpic_num = pic_num;
499 rm->pktpos = url_ftell(pb);
500 }
501 if(type == 2)
502 len = FFMIN(len, pos);
503
504 if(++rm->cur_slice > rm->slices)
505 return 1;
506 AV_WL32(rm->videobuf - 7 + 8*rm->cur_slice, 1);
507 AV_WL32(rm->videobuf - 3 + 8*rm->cur_slice, rm->videobufpos - 8*rm->slices - 1);
508 if(rm->videobufpos + len > rm->videobufsize)
509 return 1;
510 if (get_buffer(pb, rm->videobuf + rm->videobufpos, len) != len)
511 return AVERROR(EIO);
512 rm->videobufpos += len;
513 rm->remaining_len-= len;
514
515 if(type == 2 || (rm->videobufpos) == rm->videobufsize){
516 rm->videobuf[0] = rm->cur_slice-1;
517 if(av_new_packet(pkt, rm->videobufpos - 8*(rm->slices - rm->cur_slice)) < 0)
518 return AVERROR(ENOMEM);
519 memcpy(pkt->data, rm->videobuf, 1 + 8*rm->cur_slice);
520 memcpy(pkt->data + 1 + 8*rm->cur_slice, rm->videobuf + 1 + 8*rm->slices,
521 rm->videobufpos - 1 - 8*rm->slices);
522 pkt->pts = AV_NOPTS_VALUE;
523 pkt->pos = rm->pktpos;
524 return 0;
525 }
526
527 return 1;
528 }
529
530 static inline void
531 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
532 {
533 uint8_t *ptr;
534 int j;
535
536 if (st->codec->codec_id == CODEC_ID_AC3) {
537 ptr = pkt->data;
538 for (j=0;j<pkt->size;j+=2) {
539 FFSWAP(int, ptr[0], ptr[1]);
540 ptr += 2;
541 }
542 }
543 }
544
545 int
546 ff_rm_parse_packet (AVFormatContext *s, AVStream *st, int len, AVPacket *pkt,
547 int *seq, int *flags, int64_t *timestamp)
548 {
549 ByteIOContext *pb = s->pb;
550 RMContext *rm = s->priv_data;
551
552 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
553 rm->current_stream= st->id;
554 if(rm_assemble_video_frame(s, rm, pkt, len) == 1)
555 return -1; //got partial frame
556 } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
557 if ((st->codec->codec_id == CODEC_ID_RA_288) ||
558 (st->codec->codec_id == CODEC_ID_COOK) ||
559 (st->codec->codec_id == CODEC_ID_ATRAC3)) {
560 int x;
561 int sps = rm->sub_packet_size;
562 int cfs = rm->coded_framesize;
563 int h = rm->sub_packet_h;
564 int y = rm->sub_packet_cnt;
565 int w = rm->audio_framesize;
566
567 if (*flags & 2)
568 y = rm->sub_packet_cnt = 0;
569 if (!y)
570 rm->audiotimestamp = *timestamp;
571
572 switch(st->codec->codec_id) {
573 case CODEC_ID_RA_288:
574 for (x = 0; x < h/2; x++)
575 get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
576 break;
577 case CODEC_ID_ATRAC3:
578 case CODEC_ID_COOK:
579 for (x = 0; x < w/sps; x++)
580 get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
581 break;
582 }
583
584 if (++(rm->sub_packet_cnt) < h)
585 return -1;
586 else {
587 rm->sub_packet_cnt = 0;
588 rm->audio_stream_num = st->index;
589 rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
590 // Release first audio packet
591 av_new_packet(pkt, st->codec->block_align);
592 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
593 *timestamp = rm->audiotimestamp;
594 *flags = 2; // Mark first packet as keyframe
595 }
596 } else if (st->codec->codec_id == CODEC_ID_AAC) {
597 int x;
598 rm->audio_stream_num = st->index;
599 rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
600 if (rm->sub_packet_cnt) {
601 for (x = 0; x < rm->sub_packet_cnt; x++)
602 rm->sub_packet_lengths[x] = get_be16(pb);
603 // Release first audio packet
604 rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
605 av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
606 *flags = 2; // Mark first packet as keyframe
607 }
608 } else {
609 av_get_packet(pb, pkt, len);
610 rm_ac3_swap_bytes(st, pkt);
611 }
612 } else
613 av_get_packet(pb, pkt, len);
614
615 if( (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
616 || st->discard >= AVDISCARD_ALL){
617 av_free_packet(pkt);
618 return -1;
619 }
620
621 pkt->stream_index = st->index;
622
623 #if 0
624 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
625 if(st->codec->codec_id == CODEC_ID_RV20){
626 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
627 av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
628
629 seq |= (*timestamp&~0x3FFF);
630 if(seq - *timestamp > 0x2000) seq -= 0x4000;
631 if(seq - *timestamp < -0x2000) seq += 0x4000;
632 }
633 }
634 #endif
635
636 pkt->pts= *timestamp;
637 if (*flags & 2)
638 pkt->flags |= PKT_FLAG_KEY;
639
640 return 0;
641 }
642
643 void
644 ff_rm_retrieve_cache (AVFormatContext *s, AVStream *st, AVPacket *pkt)
645 {
646 ByteIOContext *pb = s->pb;
647 RMContext *rm = s->priv_data;
648
649 assert (rm->audio_pkt_cnt > 0);
650
651 if (st->codec->codec_id == CODEC_ID_AAC)
652 av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
653 else {
654 av_new_packet(pkt, st->codec->block_align);
655 memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
656 (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
657 st->codec->block_align);
658 }
659 rm->audio_pkt_cnt--;
660 pkt->flags = 0;
661 pkt->stream_index = st->index;
662 }
663
664 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
665 {
666 RMContext *rm = s->priv_data;
667 ByteIOContext *pb = s->pb;
668 AVStream *st;
669 int i, len;
670 int64_t timestamp, pos;
671 int flags;
672
673 if (rm->audio_pkt_cnt) {
674 // If there are queued audio packet return them first
675 st = s->streams[rm->audio_stream_num];
676 ff_rm_retrieve_cache(s, st, pkt);
677 } else if (rm->old_format) {
678 st = s->streams[0];
679 if (st->codec->codec_id == CODEC_ID_RA_288) {
680 int x, y;
681
682 for (y = 0; y < rm->sub_packet_h; y++)
683 for (x = 0; x < rm->sub_packet_h/2; x++)
684 if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
685 return AVERROR(EIO);
686 rm->audio_stream_num = 0;
687 rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
688 // Release first audio packet
689 av_new_packet(pkt, st->codec->block_align);
690 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
691 pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
692 pkt->stream_index = 0;
693 } else {
694 /* just read raw bytes */
695 len = RAW_PACKET_SIZE;
696 len= av_get_packet(pb, pkt, len);
697 pkt->stream_index = 0;
698 if (len <= 0) {
699 return AVERROR(EIO);
700 }
701 pkt->size = len;
702 }
703 rm_ac3_swap_bytes(st, pkt);
704 } else {
705 int seq=1;
706 resync:
707 len=sync(s, &timestamp, &flags, &i, &pos);
708 if(len<0)
709 return AVERROR(EIO);
710 st = s->streams[i];
711
712 if (ff_rm_parse_packet (s, st, len, pkt, &seq, &flags, &timestamp) < 0)
713 goto resync;
714
715 if((flags&2) && (seq&0x7F) == 1)
716 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
717 }
718
719 return 0;
720 }
721
722 static int rm_read_close(AVFormatContext *s)
723 {
724 RMContext *rm = s->priv_data;
725
726 av_free(rm->audiobuf);
727 av_free(rm->videobuf);
728 return 0;
729 }
730
731 static int rm_probe(AVProbeData *p)
732 {
733 /* check file header */
734 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
735 p->buf[2] == 'M' && p->buf[3] == 'F' &&
736 p->buf[4] == 0 && p->buf[5] == 0) ||
737 (p->buf[0] == '.' && p->buf[1] == 'r' &&
738 p->buf[2] == 'a' && p->buf[3] == 0xfd))
739 return AVPROBE_SCORE_MAX;
740 else
741 return 0;
742 }
743
744 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
745 int64_t *ppos, int64_t pos_limit)
746 {
747 RMContext *rm = s->priv_data;
748 int64_t pos, dts;
749 int stream_index2, flags, len, h;
750
751 pos = *ppos;
752
753 if(rm->old_format)
754 return AV_NOPTS_VALUE;
755
756 url_fseek(s->pb, pos, SEEK_SET);
757 rm->remaining_len=0;
758 for(;;){
759 int seq=1;
760 AVStream *st;
761
762 len=sync(s, &dts, &flags, &stream_index2, &pos);
763 if(len<0)
764 return AV_NOPTS_VALUE;
765
766 st = s->streams[stream_index2];
767 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
768 h= get_byte(s->pb); len--;
769 if(!(h & 0x40)){
770 seq = get_byte(s->pb); len--;
771 }
772 }
773
774 if((flags&2) && (seq&0x7F) == 1){
775 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
776 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
777 if(stream_index2 == stream_index)
778 break;
779 }
780
781 url_fskip(s->pb, len);
782 }
783 *ppos = pos;
784 return dts;
785 }
786
787 AVInputFormat rm_demuxer = {
788 "rm",
789 NULL_IF_CONFIG_SMALL("RM format"),
790 sizeof(RMContext),
791 rm_probe,
792 rm_read_header,
793 rm_read_packet,
794 rm_read_close,
795 NULL,
796 rm_read_dts,
797 };